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© Mitsubishi Forklift Trucks 2013. All
© Mitsubishi Forklift Trucks 2013. All rights reserved.rights reserved. Revision: BRevision: B
Document ID: 615023Document ID: 615023
75 (244)75 (244)
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PBV20N2 PBV20N2 Service Service ManualManual
Page numbers, the circuit diagram number and the revision letter can be found in Page numbers, the circuit diagram number and the revision letter can be found in thethe
bottom right corner of the bottom right corner of the page.page.
Figure 47. Page modification historyFigure 47. Page modification history
On the bottom left side of On the bottom left side of the circuit diagram, you can see the circuit diagram, you can see the modification history of thethe modification history of the
page.page.
6.26.2
Power sourcePower source
This truck product family uses wet This truck product family uses wet lead-acid batteries, which consist of 12 cells andlead-acid batteries, which consist of 12 cells and
supply a nominal voltage of 24 volts. The batteries have the supply a nominal voltage of 24 volts. The batteries have the maximum capacity ofmaximum capacity of
500 Ah, depending on the truck model. The batteries reside in a separate compartment500 Ah, depending on the truck model. The batteries reside in a separate compartment
and are connected to the system via and are connected to the system via the X1 battery connector. In the the X1 battery connector. In the electricalelectrical
schematic diagram, the battery is presented as G1 in zone schematic diagram, the battery is presented as G1 in zone 11 on page 1.11 on page 1.
6.36.3 Safety circuit (emergency stop button)Safety circuit (emergency stop button)
If the emergency stop button (S9) If the emergency stop button (S9) is in its is in its normal closed position, B+ continues to flownormal closed position, B+ continues to flow
to the key switch (S1). B+ also flows to the key switch (S1). B+ also flows to the main power contactor coil (K1). The operatorto the main power contactor coil (K1). The operator
can shut down the system power at can shut down the system power at any time by pressing the emergency stop button.any time by pressing the emergency stop button.
When the button is pressed, the connection opens and removes B+ from the mainWhen the button is pressed, the connection opens and removes B+ from the main
contactor coil (K1).contactor coil (K1).
6.46.4 Key switchKey switch
The main key switch S1 The main key switch S1 controls the electrical power supply to the entire controls the electrical power supply to the entire system withsystem with
the help of the main the help of the main contactor K1. The coil controlling the K1 contacts is contactor K1. The coil controlling the K1 contacts is presented inpresented in
zone 17 on page 1.zone 17 on page 1.
The key switch is activated by turning it to the ON position. When the key switch S1The key switch is activated by turning it to the ON position. When the key switch S1
closes, B+ flows to closes, B+ flows to the coil of the the coil of the main contactor K1, the negative is connected to themain contactor K1, the negative is connected to the
battery via the controller pin 6 battery via the controller pin 6 of the connector XA1B and the contactor K1 of the connector XA1B and the contactor K1 closes thecloses the
contacts. Positive electrical power is supplied to the system contacts. Positive electrical power is supplied to the system through the main fuse 5F1.through the main fuse 5F1.
The fuse 5F1 is rThe fuse 5F1 is rated at 300 A. In ated at 300 A. In the electrical schematic diagram, the location of thethe electrical schematic diagram, the location of the
main fuses is illustrated in zone 27 on page 1. After the main fuse 5F1, the +B supply ismain fuses is illustrated in zone 27 on page 1. After the main fuse 5F1, the +B supply is
fed to the contacts of fed to the contacts of the pump motor M2. The pump motor negative is controlled by thethe pump motor M2. The pump motor negative is controlled by the
pump controller. In the schematic diagram, the M2 contacts are presented in zone 21 onpump controller. In the schematic diagram, the M2 contacts are presented in zone 21 on
page 1.page 1.
The traction motor is controlled by the The traction motor is controlled by the traction controller. In the schematic diagram, thetraction controller. In the schematic diagram, the
M1 contacts are presented in zone 23 on M1 contacts are presented in zone 23 on page 1. The main voltage is supplied to thepage 1. The main voltage is supplied to the
terminal BF on the traction controller.terminal BF on the traction controller.
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